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问题 单项选择题 A1型题

有关肘关节损伤后遗症，哪种说法不正确（）

A.肘内翻畸形的发生率为9%～57%，内翻大于20°时即应手术矫形

B.肘关节骨化性肌炎的发生率儿童高于成年人

C.肘关节损伤后可继发尺神经炎

D.肘外翻达35°以上者应考虑手术治疗

E.创伤性骨化性肌炎与进行性骨化性肌炎不是一种疾病，发病部位与表现亦不相同

答案

参考答案：B

解析：肘关节骨化性肌炎的发生率成年人高于儿童。

单项选择题

关于社区卫生服务的概念，正确的是（）

A.这是社区服务中一种最基本的、便宜的服务形式

B.在人类社会发展的不同阶段，它有不同的内容、方法和制度

C.它以三级卫生机构为主体

D.它以需要为导向，提供无偿服务

E.它以解决慢性病和常见病为主要目标
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单项选择题

The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth —is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space.

Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth. The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change—information that may be used to predict future climates.

The word "extracting" underlined in Paragraph 2 is closest in meaning to().

A. breaking

B. locating

C. removing

D. analyzing
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